- * @param string $sectionId The section's ID, given as a numeric string.
- * The ID "0" retrieves the section before the first heading, "1" the
- * text between the first heading (included) and the second heading
- * (excluded), etc.
+ * @param string|number $sectionId Section identifier as a number or string
+ * (e.g. 0, 1 or 'T-1'). The ID "0" retrieves the section before the first heading, "1" the
+ * text between the first heading (included) and the second heading (excluded), etc.